Department of Radiology, Cheil General Hospital & Women's Healthcare Center, Kwandong University College of Medicine, Seoul, Korea.
Ultrasound Obstet Gynecol. 2010 May;35(5):556-9. doi: 10.1002/uog.7598.
To investigate the in-utero development of the fetal anal sphincter using transabdominal ultrasound.
This was a cross-sectional study in which the diameter of the fetal anal sphincter was measured sonographically once in 631 well-dated, non-anomalous fetuses scanned between 19 and 38 weeks of gestation. Visualization rates were determined. Regression analysis was used to assess the relationship between the diameter of the fetal anal sphincter and gestational age (GA), and reference values including the mean and 95% reference interval were calculated for each GA.
The sonographic visualization rate of the fetal anal sphincter increased with gestational age, plateauing at 90-100% between 23-34 weeks of gestation. There was a significant positive relationship between fetal anal sphincter diameter and GA, which was best described by the equation: anal sphincter diameter (mm) = - 0.014 x GA(2) + 1.107 x GA - 11.664 (R(2) = 0.62).
We have provided reference values for the in-utero development of the fetal anal sphincter throughout gestation.
使用经腹超声探讨胎儿肛门括约肌的宫内发育情况。
这是一项横断面研究，对 19 至 38 孕周的 631 例正常胎儿进行了一次超声测量胎儿肛门括约肌直径。确定了可视化率。回归分析用于评估胎儿肛门括约肌直径与胎龄（GA）之间的关系，并为每个 GA 计算了均值和 95%参考区间的参考值。
胎儿肛门括约肌的超声可视化率随胎龄增加而增加，在 23-34 孕周之间稳定在 90-100%。胎儿肛门括约肌直径与 GA 之间存在显著的正相关关系，最佳描述方程为：肛门括约肌直径（mm）=-0.014xGA(2)+1.107xGA-11.664（R(2)=0.62）。
我们为胎儿肛门括约肌在整个孕期的宫内发育提供了参考值。
